Derringer coil is killing my kogendo!

[SteamStack]

What the freak is going on with my derringer clone??

This will be the forth time I've re wicked the coil! It keeps desolving my wick or something? I keep checking the wick after a day and here I see hot spots on the coil so i instantly know once again there's no wick left inside the coil? I touch the wick and here it just falls off the ends of the coil and nothing left inside the coil!

Craziest thing I've ever experianced with rbas.



Hard to see but the brown spots are the ends of the wick after pulled off the coil. That's how deep they were in the coil.. or what's left of them.

 

[Fuzzy Bruce]

Might be you are using to much cotton. I go with the less is better theory. To much KGD may be causing a choking of the juice, causing your problem.

Do you peel the "skin" off the KGD before wicking? Found this to really help with wicking the juice.

 

[SteamStack]

Yes it's only a half piece Split in half.

At first I thought it was cause the wick was too thin and it separated inside the long coil.. so it made sense to me. So then I tightly rolled it up like you would at the end to get the wick through but farther down the wick so it would catch something and tear apart. Was fine for a few hours and noticed the coil getting dark like the other cause now juice was reaching the coil unlike before. Still happend twice since! Just the same side everytime.

I mean I'm pulling it back and forth and it's pretty loose and no tears and I'm not stretching it out.

All I can think is that one coil is dry burning alot and fring up the wick no nothing.

P.S. my coil is a nano coil.. smallest mandrel on the artistic coiler. 14 wraps of 28 gage Comes out to like .80ohms.

 

[State O' Flux]

Bruce's - too tight a wick fit - is a real common error with wicking, and one of my first points as well.

Another is those coils look to have a very small ID... where it wouldn't take much coil radiant heat (what wire gauge, what net resistance?) for too long to completely consume the juice-in-coil... and run bone dry before the wicks capillary action can replenish the wick-in-coil.

 

[SteamStack]

Here's what it looks like after re wicking both sides this time.

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[SteamStack]

I'm not sure the gage of the mandrel but it's the smallest one thst came with the artistic wire set from Michaels. Think it's 2mm. using 28 gage coil 14 wraps. Runing 2 comes out to about .80 ohms.

 

[zero7starz]

Here's what it looks like after re wicking both sides this time.

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Pics don't work

 

[SteamStack]

 

[Fuzzy Bruce]

I wrap 26 g on a 1.5 mm screwdriver. Peel the skin off the KGD and cut the thickness about 2 mm, This size slides easily through the coil without moving the mod at all. A lot may depend on the juice used, too. I do notice I need to re-wick more often when using the sweeter juices, almost once a day compared to every other day with straight VG and nic.

 

[Fuzzy Bruce]

View attachment 424985

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Now, seeing the pictures, I would say to much wick, but, that is just me speaking as a noob to squonking.

 

[State O' Flux]

I'm not sure the gage of the mandrel but it's the smallest one thst came with the artistic wire set from Michaels. Think it's 2mm. using 28 gage coil 14 wraps. Runing 2 comes out to about .80 ohms.

That would be around a 1.4mm ID to get 14 wraps from 28 gauge for 0.8Ω... pretty small, but not unusual. Your Ohm's law heat flux is a pretty cool 120 mW/mm² +/-... so it's definitely not too hot.

You might try going up on the ID (which will allow a larger wick/juice surface area in the coil), reducing your coil count and shortening the coil... making it a bit easier for the juice to replenish the center of the coils.

 

[SteamStack]

That's what I figure.. I normally use a huge diameter coil but seen a build called the dragon where it was really slanted up and had wick only around and under the coil covering the one end of rhe coil.. tried that and it seemed like too much wick and it was choking rhe coil. So I just tried putting ko gen do inside only and it worked great just like the video I seen. Massive clouds unlike I've ever had prior. So with the Dillenger rba I had to go back to flat across coils.. seemed to work. Prob chain vaping on it too much causing it to burn out the coil. Either squank her more or just go back to huge coils.

 

[SteamStack]

I'm normally double fisted with reos so I can chain vape and still give the wick time to catch up but my other 2 friends are hopefully on there way back from the spa.

 

[JamezC]

That would be around a 1.4mm ID to get 14 wraps from 28 gauge for 0.8Ω... pretty small, but not unusual. Your Ohm's law heat flux is a pretty cool 120 mW/mm² +/-... so it's definitely not too hot.

You might try going up on the ID (which will allow a larger wick/juice surface area in the coil), reducing your coil count and shortening the coil... making it a bit easier for the juice to replenish the center of the coils.

I second this. I would definitely bump up the ID, and use less wraps to achieve the same resistance (or right around).

 

[super_X_drifter]

Steam, if it's the smallest rod in the 5 rod set it is too small to efficiently wick thru. Try the second smallest rod. It's about the smallest you'd wanna go if you are gonna wick thru the coils

 

[Spydro]

^^^ +1

If I remember the vertical dragon coil was built on a .050/0.55" form with the wicking wrapped around the outside only. That's about a 1.3mm form. The smallest rod in the Gizmo is only 1.0mm, too small to wick through effectively probably, and the next size up is 1.5mm. That extra .5mm makes a difference.

Personally I never build small coils anymore... instead build larger and adjust the wire gauge and/or twist for what I want. Still get the end results wanted, they are easier to wick and the wicks last a lot longer with my VLLH's.

 

[muzichead]

Just my here, I think where your problem lies is in the number of wraps... Those coils are still cooking your wick and whatever liquid remains in them long after you have released the firing button.... Long coils like that take a lot of time to heat up and just as long to cool down which would lead to cooking any and all liquid remaining in your wicks before you could even get a second hit on those coils.. As a few have mentioned, you can go with a larger diameter coil and less wraps to achieve what you are looking for, especially with cotton.... It has been almost 2yrs now since I vaped any coil that was over 6 wraps, for this very reason...

 

[SteamStack]

Alright then.. Guess I'm moving up a rod size and give it another go. Damn wick desolved once again as I just checked it this morning. Just touch the ends of the wick and it just falls off the coil.

I've never had this happen to me in the past. Been doing rebuildables since the ERA from buds worx.. still have one and 2 hornets.

Anyways its just crazy how everytime it's the same coil and the other size is fine. It's a haunted coil! Lol

 

[SteamStack]

On another note.. praxis finally got ahold of me last night and told me to send the while new derringer in for replacement since my air holes on the cap seem to be cut too low. Cuts off rhe top of the air channels. Figured just the top would be replaced or they would just mail me a new top.

Said it was a prob with manufacturing and that they didn't catch it in time and was late with a 2500 atty run.

So I'm not too happy about paying to mail it back and waiting another week for them to get it and then waiting another week to get it back.

Seriously thinking about just keeping it and fixing it myself now. The middle post is tight and I'm afraid whatever I get back will have the spinning post issue.

Just itching to drill the feed hole as there's not much material in the center post left to drill out.. seems like just an 8th of an inch.

Could prob just keep it as is but thinking if I lower the air holes on the inner ring then I would not have to keep my coil so high off the deck near the lid to insure air flow under the coil.

 

[SteamStack]

Correction! Not the smallest size rod I was using, the one up from that. Like u said looks like 2mm. The size one would use for that ready x wick.

Measured one coil after I removed the one coil and it was 1.75ohms.

Next size up would be my custom old coat hanger rod hehe.